Description

Overview

The QR-1 Quick Release Valve 3/8in x 1/4in speeds the exhaust of air from brake chambers, therefore trailer brakes release faster and circuits reset quickly. Install it near the actuators to shorten exhaust paths and, as a result, improve response on heavy trailers and dollies.

Features

• QR-1 pattern valve with 3/8 NPT supply and twin 1/4 NPT delivery ports
• 1 psi crack pressure for prompt reset of service circuits
• 1 1/2 inch mounting-hole spacing for straightforward replacement work
• Compact body that suits axle or crossmember mounting close to chambers

Specifications and Materials

Part number: AB8315B.
Model: QR-1 style quick release valve. Function: accelerates chamber exhaust for quicker brake release. Ports: supply 3/8 NPT, deliveries 1/4 NPT (2). Mounting-hole spacing: 1 1/2 inch. Recommended location: as close as practical to the service chambers.
For construction details, operation and servicing, see the Bendix QR-1 quick release valves manufacturer service data.

Compatibility and Fitment

This cross-reference listing means this valve is a suitable replacement for the part numbers and applications shown. Some changes in air line plumbing may be required.
229813

Compliance and Safety

Depressurise the air system before removal. Next, mark and cap each line to maintain correct porting. After installation, perform a soap-and-water leak test, then cycle the brakes and verify full pressure recovery. Finally, confirm each connected chamber exhausts freely through the valve.

Trailer Applications

Use this QR-1 quick release valve where rapid brake release reduces lining drag and heat. For example, you can mount it between paired service chambers on an axle to vent locally. Moreover, the standard NPT porting supports quick retrofits on semi-trailers, B-doubles and converter dollies.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Why Choose ICS Trailers

We verify specifications against authoritative data and focus on proven parts for Australian heavy trailers. Consequently, installers finish the job faster and fleets keep downtime low.
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